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I can't understand what is wrong with my code. I'm getting WA. Could anyone help me?


#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <algorithm>

using namespace std;

double min(double a, double b) {
return a < b ? a : b;
}

double abs(double a) {
return a < 0 ? -a : a ...

The test cases of this problems are wrong. Actually, you just need to verify if each substring is prefix of the original. I've done this way and got AC.